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Porcelli, P., De Carne, M., & Todarello, O. (2004). Prediction of treatment outcome of patients with functional gastrointestinal disorders by the diagnostic criteria for psychosomatic research. Psychotherapy & Psychosomatics, 73, 166-173. doi:10.1159/000076454

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• TITLE: Assessment of Alexithymia: Psychometric Properties of the Psychological Treatment Inventory-Alexithymia Scale (PTI-AS)

  AUTHORS: Alessio Gori, Marco Giannini, Giulia Palmieri, Roberta Salvini, David Schuldberg

  KEYWORDS: Alexithymia; Personality Tests; Psychological Assessment; Psychometrics; AffectiveSymptoms

  JOURNAL NAME: Psychology, Vol.3 No.3, March 19, 2012

  ABSTRACT: Background: The aim of this study is to investigate the psychometric properties of a new measure of alexithymia, the Psychological Treatment Inventory-Alexithymia Scale (PTI-AS). Method: A group of 778 participants completed the PTI-AS. In order to evaluate aspects of concurrent validity, a part of the sample (n = 116) completed the PTI-AS, the Twenty-Items Toronto Alexithymia Scale (TAS-20) and the Bermond-Vorst Alexithymia Questionnaire (BVAQ). In order to evaluate aspects of discriminant validity a group of patients with a diagnosis of Eating Disorders completed the PTI-AS, the TAS-20 and the Eating Disorders Inventory (EDI-3). Results: Exploratory Factor Analysis (EFA) showed a solid structure with one factor. Results were confirmed by Confirmatory Factor Analysis (CFA), which yielded good fit indices (CFI = .98; TLI = .95; RMSEA = .08; SRMR = .04). The PTI Alexithymia Scale showed a good degree of internal consistency (α = .88). Correlations between the PTI Alexithymia Scale, the TAS-20 (r = .74, p